diff --git a/src/components/CreateWorksheetModal.jsx b/src/components/CreateWorksheetModal.jsx
index d5f5828..26c6bfd 100644
--- a/src/components/CreateWorksheetModal.jsx
+++ b/src/components/CreateWorksheetModal.jsx
@@ -51,7 +51,8 @@ export default function CreateWorksheetModal({ isOpen, onClose, workorder, onCre
     endDate: today,
     endTime: '',
     details: '',
-    isComment: false
+    isComment: false,
+    countsToPlan: false
   })
 
   const [loading, setLoading] = useState(false)
@@ -77,7 +78,8 @@ export default function CreateWorksheetModal({ isOpen, onClose, workorder, onCre
         endDate: today,
         endTime: '',
         details: '',
-        isComment: false
+        isComment: false,
+        countsToPlan: false
       })
       setError('')
       setAutoCalculate(true)
@@ -146,6 +148,7 @@ export default function CreateWorksheetModal({ isOpen, onClose, workorder, onCre
         endTime: formData.endTime,
         details: formData.details,
         isComment: formData.isComment,
+        countsToPlan: !formData.isComment && formData.countsToPlan,
         employeeShort: user?.prefs?.shortCode || '' // Aus User-Preferences
       }
 
@@ -240,6 +243,18 @@ export default function CreateWorksheetModal({ isOpen, onClose, workorder, onCre
                   Nur Kommentar (keine Arbeitszeit)
                 </label>
               </div>
+
+              <div className="form-group">
+                <label style={{ display: 'flex', alignItems: 'center', gap: '8px' }} title="Zeit wird vom Stundenguthaben des Wartungs-Abos abgezogen und im Kundenportal angezeigt">
+                  <input
+                    type="checkbox"
+                    checked={formData.countsToPlan && !formData.isComment}
+                    disabled={formData.isComment}
+                    onChange={(e) => handleChange('countsToPlan', e.target.checked)}
+                  />
+                  Vom Abo-Stundenkonto abziehen
+                </label>
+              </div>
             </div>
 
             <div className="col col-6">
diff --git a/src/components/TicketRow.jsx b/src/components/TicketRow.jsx
index cb8ddd7..0ecb06d 100644
--- a/src/components/TicketRow.jsx
+++ b/src/components/TicketRow.jsx
@@ -68,6 +68,8 @@ export default function TicketRow({ ticket, onUpdate, onExpand }) {
 
   // Startzeit fuer Git-Push-Worksheets nachtragen (Endzeit kam vom Push)
   const handleSaveWorksheetTime = async (ws, data) => updateWorksheet(ws.$id, data)
+  // Wartungs-Abo: Arbeitszeit aufs Stundenkonto des Kunden buchen (Kundenportal zeigt den Stand)
+  const handleTogglePlan = async (ws) => updateWorksheet(ws.$id, { countsToPlan: !ws.countsToPlan })
 
   const createdAt = new Date(ticket.$createdAt || ticket.createdAt)
   const elapsed = formatDistanceToNow(createdAt, { locale: de })
@@ -243,7 +245,7 @@ export default function TicketRow({ ticket, onUpdate, onExpand }) {
                         </div>
                       )}
 
-                      <WorksheetList worksheets={worksheets} totalTime={getTotalTime()} loading={worksheetsLoading} onEditTime={setEditTimeWorksheet} />
+                      <WorksheetList worksheets={worksheets} totalTime={getTotalTime()} loading={worksheetsLoading} onEditTime={setEditTimeWorksheet} onTogglePlan={handleTogglePlan} />
                     </div>
                   )}
 
diff --git a/src/components/WorksheetList.jsx b/src/components/WorksheetList.jsx
index c7f6770..a169471 100644
--- a/src/components/WorksheetList.jsx
+++ b/src/components/WorksheetList.jsx
@@ -5,7 +5,7 @@ function needsTimeEntry(ws) {
   return ws.serviceType === 'GIT' && (!ws.startTime || !Number(ws.totalTime))
 }
 
-export default function WorksheetList({ worksheets, totalTime, loading, onEditTime }) {
+export default function WorksheetList({ worksheets, totalTime, loading, onEditTime, onTogglePlan }) {
   const [expandedWorksheets, setExpandedWorksheets] = useState({})
   if (loading) {
     return (
@@ -123,6 +123,13 @@ export default function WorksheetList({ worksheets, totalTime, loading, onEditTi
                           <FaClock className="me-1" /> Zeit offen
                         </span>
                       )}
+                      {ws.countsToPlan && !ws.isComment && (
+                        <span className="badge ms-2" title="Wird vom Stundenguthaben des Wartungs-Abos abgezogen" style={{
+                          background: '#9d3dfe'
+                        }}>
+                          Abo-Stunden
+                        </span>
+                      )}
                     </div>
                     {/* Collapsed: Mitarbeiter & Zeit im Header */}
                     {!isExpanded && (
@@ -165,6 +172,27 @@ export default function WorksheetList({ worksheets, totalTime, loading, onEditTi
                         <FaClock className="me-1" /> Zeit nachtragen
                       </button>
                     )}
+                    {onTogglePlan && !ws.isComment && Number(ws.totalTime) > 0 && (
+                      <button
+                        type="button"
+                        className="btn btn-sm"
+                        title={ws.countsToPlan ? 'Nicht mehr vom Abo-Stundenkonto abziehen' : 'Vom Abo-Stundenkonto des Kunden abziehen'}
+                        style={{
+                          background: ws.countsToPlan ? '#9d3dfe' : 'rgba(255,255,255,0.15)',
+                          color: 'white',
+                          border: '1px solid rgba(255,255,255,0.4)',
+                          borderRadius: '6px',
+                          padding: '2px 10px',
+                          fontSize: '0.8rem',
+                        }}
+                        onClick={(e) => {
+                          e.stopPropagation()
+                          onTogglePlan(ws)
+                        }}
+                      >
+                        {ws.countsToPlan ? '✓ Abo' : '+ Abo'}
+                      </button>
+                    )}
                     <small style={{ opacity: 0.9 }}>
                       {formatDateTime(ws.startDate, ws.startTime) || formatDateTime(ws.endDate, ws.endTime)}
                     </small>
diff --git a/src/hooks/useWorksheets.js b/src/hooks/useWorksheets.js
index 5d457d6..38c200f 100644
--- a/src/hooks/useWorksheets.js
+++ b/src/hooks/useWorksheets.js
@@ -340,6 +340,7 @@ export function useWorksheets(woid = null) {
         endTime: data.endTime || '',
         details: data.details.trim(),
         isComment: data.isComment || false,
+        countsToPlan: !data.isComment && Boolean(data.countsToPlan),
         createdAt: new Date().toISOString()
       }